Brick mold used in brick-pressing machines



UNITED sTATEs PATENT oEErcE.

BENJAMIN H. BROWN, OF ALEXANDRIA, DISTRICT OF COLUMBIA.

BRICK MOLD USED IN BRICK-PRESSING MACHINES.

Specification of Letters Patent No. 436, dated October 23, 1837.

To all whom, t may concern Be it known that I, BENJAMIN H. BROWN, of the city of Alexandria, in the District of Columbia, have invented an improvement in the mode of constructing thermolds used for pressing brick, which improved mold is intended to be applied in the machine for pressing brick from dry clay for which a patent was granted to Nathan Sawyer on the eighth day of April, 1835, but which may' also be employed in other machines for the same purpose; and I do hereby declare that the following is a full and exact description thereof. v

The upper edge of the mold is made concave on two sides, as in said Sawyers machine, for the purpose expressed in his speciication thereof; but I make the said mold in two thicknesses, consisting of two boxes, or frames, one fitting wit-hin the other, as shown in the accompanying drawing, in which Figure 1 represents the upper, and Fig. 2, the lower side of my compound mold.

a, a is the outer box, or mold, and b, b, the inner which latter fits within the former, and slides freely in it. In both figures it is represented as depressed below the edge: of the outer mold, but when not in use the edges coincide, the two boxes being of the same depth. The upper edges c, o, it will be seen, are hollowed, as above mentioned. d, d, are two springs which bear the inner mold up, and tend to keep it flush with the outer, but which allow it t0 descend when pressed upon.

In the mold as formerly used, it was exi forth.

B. H. BROWN. Witnesses:

W. THOMPSON, Gr. THORN. 

